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Torsion-free subgroups of finite index in the Picard group are the fundamental groups of hyperbolic 3-manifolds. The Picard group is a polygonal product of finite groups. Recent work by Karrass. Pietrowski and Soli tar on the subgroups of a polygonal product make it feasible to calculate all the torsion-free subgroups of any finite index. This computation(More)
We describe the activation of a K+ current and inhibition of a Cl- current by a cyanoguanidine activator of ATP-sensitive K+ channels (KATP) in the smooth muscle cell line A10. The efficacy of U83757, an analogue of pinacidil, as an activator of KATP was confirmed in single channel experiments on isolated ventricular myocytes. The effects of U83757 were(More)
Short is the distance between the elementary and the most sophisticated results, which brings rank beginners close to certain current concerns of the specialists. There is a host of simple observations that everyone can appreciate and believe to be true, but not even the greatest experts can prove or disprove. There is a supply of unsolved, elementary(More)